The trailer for the second season of Netflix series "Stranger Things" aired during Sunday's Super Bowl, a 30-second spot that reportedly cost the online streaming service $5 million. Fans of the show will have to wait until Halloween to catch up with the fictional town of Hawkins, Indiana, but here are five things we learned from the clip.

1. Eleven is still alive

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Whew. Our favorite MKUltra prodigy survived her intense battle with the Demogorgon at the end of season one. The trailer's opening shot shows Eleven waking up (possibly in the Upside Down?) with her trademark bloody nose. Get your waffles ready, people.

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2. Will isn't doing well

Will is shown in a medical facility with Joyce as a man in a suit watches via security camera. The man appears to be Paul Reiser, who will play Dr. Owens, a member of the Department of Energy sent to cover up the town's supernatural events.

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3. It's one year later

Mike, Lucas and Dustin are seen wearing "Ghostbusters" costumes at school, most likely during the second season's third episode, "The Pumpkin Patch." The comedy film reached theaters in June of 1984, and the date "October 30, 1984" is seen on the monitors of the hospital where Will is receiving treatment.

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4. The Thessalhydra is waaaaay scarier than the Demogorgon

The Demogorgon, the faceless monster of nightmares, was obliterated into black dust by Eleven at the end of season one. However, a scene from episode eight shows Will, Mike, Lucas and Dustin referring to the Thessalhydra, another monster in fantasy tabletop game "Dungeons and Dragons."

According to an online "Dungeons and Dragons" monster guide, the two creatures are related. We were led to believe that the Demogorgon is dead, but the slug Will released into the bathroom sink at the end of last season's final episode has most likely infected the town's sewage system.

That's probably not a good thing.

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5. There's a storm coming to Hawkins, Indiana

Will is seen standing in front of his home's door as red lightning flashes across a menacing-looking sky. Another shot from the trailer shows Sheriff Jim Hopper in what could be a bunker or attic while it's being destroyed.

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Season two's fifth episode is titled "The Storm." Is the Upside Down spilling into Hawkins? Guess we'll have to wait until October to find out.